114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
#include "handle.h"
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Handle::Handle(QWidget *parent)
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: QWidget(parent)
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{
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setAutoFillBackground(true);
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setPalette(QPalette(Qt::transparent));
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resize(200,200);
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setMinimumSize(100,100);
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mouseX=width()/2;
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mouseY=height()/2;
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tim=new QTimer(this);
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connect(tim,&QTimer::timeout,this,[=]{
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emit keyNumchanged(getKeyNum());
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});
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connect(this,&Handle::keyNumchanged,this,[=](int num){
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qDebug()<<num<<Qt::endl;
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});
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}
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Handle::~Handle()
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{
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}
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void Handle::paintEvent(QPaintEvent *){
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QPainter painter(this);
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int side = qMin(width(), height());
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padR=side/2.0; //底盘半径
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padX=padR;//底盘圆心
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padY=padR;//底盘圆心
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handleR=padR/4;//摇杆圆半径
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int handleMaxR=padR-handleR;
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QColor handleColor(Qt::gray);
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//加载底盘图像
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/*painter.save();
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painter.scale(side / 400.0, side / 400.0);//坐标会随窗口缩放
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painter.drawPixmap(0, 0, QPixmap(":/image/pad.png"));
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painter.restore();*/
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//自绘底盘
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painter.save();
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QRadialGradient RadialGradient(padR,padR,padR*3,padR,padR);//圆心2，半径1，焦点2
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RadialGradient.setColorAt(0,QColor(90,90,90,127));//渐变
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RadialGradient.setColorAt(1,QColor(255,255,255,190));//渐变
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painter.setBrush(RadialGradient);
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painter.setPen(Qt::NoPen);
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painter.drawEllipse(QPoint(padR,padR),side/2,side/2);//大圆盘
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painter.restore();
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//painter.drawText(20,20,tr("%1,%2,%3").arg(mouseX).arg(mouseY).arg(handPadDis));
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if(!mousePressed){//鼠标没按下则摇杆恢复到底盘中心
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mouseX=padX;
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mouseY=padY;
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}
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handPadDis=Pointdis(padR,padR,mouseX,mouseY);
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if(handPadDis<=handleMaxR){
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handleX=mouseX;
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handleY=mouseY;
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}
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else {
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handleX=(int)(handleMaxR*(mouseX-padX)/handPadDis+padX);
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handleY=(int)(handleMaxR*(mouseY-padY)/handPadDis+padY);
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}
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// painter.drawText(200,200,tr("%1,%2,%3").arg(handleX).arg(handleY).arg(handPaddis));
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painter.setPen(Qt::NoPen);
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painter.setBrush(handleColor);
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painter.drawEllipse(QPoint(handleX,handleY),handleR,handleR);//摇杆
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}
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void Handle::mouseMoveEvent(QMouseEvent* event){
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static bool r=false;
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mouseX=event->pos().x();
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mouseY=event->pos().y();
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if(r==true){
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update();
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r=false;
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}
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else{
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r=true;
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}
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}
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void Handle::mouseReleaseEvent(QMouseEvent* event){
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mouseX=width()/2;
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mouseY=height()/2;
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tim->stop();
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mousePressed=false;
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emit keyNumchanged(Handle::stop);
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update();
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}
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void Handle::mousePressEvent(QMouseEvent* event){
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mouseX=event->pos().x();
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mouseY=event->pos().y();
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tim->start(100);
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mousePressed=true;
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update();
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}
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double Handle::Pointdis(int a,int b,int x,int y){
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return sqrt((double)((x-a)*(x-a)+(y-b)*(y-b)));
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}
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int Handle::getKeyNum(){
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int x,y;
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int keynum;
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x=(int)(handleX*3.0/(padR*2));
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y=(int)(handleY*3.0/(padR*2));
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keynum=3*y+x;
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return keynum;
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}
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